package com.atguigu.gulimall.product.service.impl;

import com.atguigu.common.constant.ProductConstant;
import com.atguigu.gulimall.product.dao.AttrAttrgroupRelationDao;
import com.atguigu.gulimall.product.dao.AttrGroupDao;
import com.atguigu.gulimall.product.dao.CategoryDao;
import com.atguigu.gulimall.product.entity.AttrAttrgroupRelationEntity;
import com.atguigu.gulimall.product.entity.AttrGroupEntity;
import com.atguigu.gulimall.product.entity.CategoryEntity;
import com.atguigu.gulimall.product.service.CategoryService;
import com.atguigu.gulimall.product.vo.AttrGroupRelationVo;
import com.atguigu.gulimall.product.vo.AttrRespVo;
import com.atguigu.gulimall.product.vo.AttrVo;
import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;

import com.atguigu.gulimall.product.dao.AttrDao;
import com.atguigu.gulimall.product.entity.AttrEntity;
import com.atguigu.gulimall.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {

    @Resource
    private AttrGroupDao attrGroupDao;
    @Resource
    private AttrAttrgroupRelationDao attrgroupRelationDao;

    @Resource
    private CategoryDao categoryDao;
    @Resource
    private CategoryService categoryService;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.save(attrEntity);
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode() && attr.getAttrGroupId()!=null){ // 基本属性
            // 保存关联关系
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            attrgroupRelationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils queryBaseAttrPage(Long catelogId, Map<String, Object> params,String attrType) {
        String key = (String) params.get("key");
        Integer type = "base".equalsIgnoreCase(attrType) ? ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode(): ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode();
        IPage<AttrEntity> page = lambdaQuery()
                .eq(catelogId != 0, AttrEntity::getCatelogId, catelogId)
                .and(StringUtils.isNotBlank(key), (wrapper -> {
                    wrapper.eq(AttrEntity::getAttrId, key)
                            .or()
                            .like(AttrEntity::getAttrName, key);
                }))
                .eq(AttrEntity::getAttrType,type)
                .page(new Query<AttrEntity>().getPage(params));

        PageUtils pageUtils = new PageUtils(page);
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> collect = records.stream().map((attrEntity -> {
            AttrRespVo AttrRespVo = new AttrRespVo();
            BeanUtils.copyProperties(attrEntity, AttrRespVo);

            if (type == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
                // 设置分组名称，分类名称
                AttrAttrgroupRelationEntity attrgroupRelationEntity = attrgroupRelationDao.selectOne(
                        new QueryWrapper<AttrAttrgroupRelationEntity>()
                                .lambda().eq(AttrAttrgroupRelationEntity::getAttrId, AttrRespVo.getAttrId())
                                .isNotNull(AttrAttrgroupRelationEntity::getAttrGroupId)
                );

                if (attrgroupRelationEntity != null && attrgroupRelationEntity.getAttrGroupId()!=null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelationEntity.getAttrGroupId());
                    AttrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }

            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            AttrRespVo.setCatelogName(categoryEntity.getName());
            return AttrRespVo;
        })).collect(Collectors.toList());

        pageUtils.setList(collect);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo respVO = new AttrRespVo();
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity, respVO);
        AttrAttrgroupRelationEntity attrgroupRelationEntity = attrgroupRelationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>()
                .lambda().eq(AttrAttrgroupRelationEntity::getAttrId, attrEntity.getAttrId())
        .isNotNull(AttrAttrgroupRelationEntity::getAttrGroupId));
        if (attrgroupRelationEntity!=null && attrgroupRelationEntity.getAttrGroupId()!=null){
            AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupRelationEntity.getAttrGroupId());
            respVO.setGroupName(attrGroupEntity.getAttrGroupName());
            respVO.setAttrGroupId(attrGroupEntity.getAttrGroupId());
        }
        CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
        List<Long> catelogPath = categoryService.findCatelogPath(attrEntity.getCatelogId());
        if (null != categoryEntity) {
            respVO.setCatelogName(categoryEntity.getName());
        }
        respVO.setCatelogPath(catelogPath);
        return respVO;
    }

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr, attrEntity);
        this.updateById(attrEntity);

        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()) { // 基本属性
            // 1.修改分组关联
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            relationEntity.setAttrId(attrEntity.getAttrId());

            Integer count = attrgroupRelationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().lambda()
                    .eq(AttrAttrgroupRelationEntity::getAttrId, relationEntity.getAttrId())
                    .eq(AttrAttrgroupRelationEntity::getAttrGroupId, relationEntity.getAttrGroupId()));

            if (count > 0) {
                attrgroupRelationDao.update(relationEntity,
                        new UpdateWrapper<AttrAttrgroupRelationEntity>().lambda()
                                .eq(AttrAttrgroupRelationEntity::getAttrId, relationEntity.getAttrId())
                                .eq(AttrAttrgroupRelationEntity::getAttrGroupId, relationEntity.getAttrGroupId()));

            } else {
                attrgroupRelationDao.insert(relationEntity);
            }
        }
    }


    /**
     * 根据分组id查找关联的所有基本属性
     *
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        List<AttrAttrgroupRelationEntity> entities = attrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_group_id", attrgroupId));

        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrId();
        }).collect(Collectors.toList());

        if (attrIds == null || attrIds.size() == 0) {
            return null;
        }
        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

    @Override
    public List<Long> selectSearchAttrs(List<Long> attrIds) {
        return lambdaQuery().in(AttrEntity::getAttrId,attrIds).eq(AttrEntity::getSearchType,1)
                .list().stream().map(AttrEntity::getAttrId).collect(Collectors.toList());
    }

    @Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        //relationDao.delete(new QueryWrapper<>().eq("attr_id",1L).eq("attr_group_id",1L));
        //
        List<AttrAttrgroupRelationEntity> entities = Arrays.asList(vos).stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        attrgroupRelationDao.deleteBatchRelation(entities);
    }

    /**
     * 获取当前分组没有关联的所有属性
     *
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1、当前分组只能关联自己所属的分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2、当前分组只能关联别的分组没有引用的属性
        //2.1)、当前分类下的其他分组
        List<AttrGroupEntity> group = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().eq("catelog_id", catelogId));
        List<Long> collect = group.stream().map(item -> {
            return item.getAttrGroupId();
        }).collect(Collectors.toList());

        //2.2)、这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = attrgroupRelationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", collect));
        List<Long> attrIds = groupId.stream().map(item -> {
            return item.getAttrId();
        }).collect(Collectors.toList());

        //2.3)、从当前分类的所有属性中移除这些属性；
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type", ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if (attrIds != null && attrIds.size() > 0) {
            wrapper.notIn("attr_id", attrIds);
        }
        String key = (String) params.get("key");
        if (!StringUtils.isEmpty(key)) {
            wrapper.and((w) -> {
                w.eq("attr_id", key).or().like("attr_name", key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);

        PageUtils pageUtils = new PageUtils(page);

        return pageUtils;
    }


}